vs 

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"Viruses" is a form of "virus", a noun which is often translated as "el virus". "Bacteria" is a form of "bacteria", a noun which is often translated as "las bacterias". Learn more about the difference between "viruses" and "bacteria" below.
virus(
vay
-
rihs
)
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
noun
a. el virus
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(M)
The virus mutated and is now deadlier than ever.El virus mutó y ahora es más mortífero que nunca.
a. el virus
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(M)
My computer has a virus, so I have to reformat it.Mi computadora tiene un virus, así que la tengo que reformatear.
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bacteria(
bahk
-
tir
-
i
-
uh
)
A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
noun
a. las bacterias
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(F)
The illness is caused by bacteria and not a virus, so we should be able to treat it easily.La enfermedad es causada por bacterias y no por un virus, así que deberíamos poder tratarla fácilmente.
b. la bacteria
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(F)
The doctor said that a test will show if some rare bacteria is making me sick.El doctor dijo que una prueba comprobará si alguna bacteria extraña me está enfermando.
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